Problem Using Bitbake to Compile Angstrom Kernel

I tried to use Bitbake to compile the kernel for the beagle board on a
virtual machine running Ubuntu 10.10. I followed the instructions on and
to configure Bitbake, but when I run the command bitbake virtual/
kernal, I get the following error:

ece@embed4:~/BeagleBoard/oe$ bitbake virtual/kernel
Pseudo is not present but is required, building this first before the
main build
ERROR: Unable to parse conf/bitbake.conf (conf/bitbake.conf:92:
unparsed line: 'TUNE_ARCH ??= "INVALID"')

looking through the conf directory, I noticed that there is no file
bitbake.conf. I'm wondering if there was an error with one of the
setup scripts or if there is some extra step that I need to run.